functions/prefs.php

   1 <?php
   2
   3 /**
   4  * prefs.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains functions for manipulating user preferences
  10  *
  11  * $Id$
  12  */
  13
  14 require_once(SM_PATH . 'functions/global.php');
  15
  16 sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
  17 sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
  18
  19 $rg = ini_get('register_globals');
  20
  21 if ( !sqsession_is_registered('prefs_are_cached') ||
  22      !isset( $prefs_cache) ||
  23      !is_array( $prefs_cache) ||
  24      substr( phpversion(), 0, 3 ) == '4.1' ||
  25      substr( phpversion(), 0, 3 ) == '4.2' ||
  26      (substr( phpversion(), 0, 3 ) == '4.0' && empty($rg))) {
  27     $prefs_are_cached = false;
  28     $prefs_cache = array();
  29 }
  30
  31 if (isset($prefs_dsn) && !empty($prefs_dsn)) {
  32     require_once(SM_PATH . 'functions/db_prefs.php');
  33 } else {
  34     require_once(SM_PATH . 'functions/file_prefs.php');
  35 }
  36
  37 /* Hashing functions */
  38
  39 function getHashedFile($username, $dir, $datafile, $hash_search = true) {
  40     global $dir_hash_level;
  41
  42     /* Remove trailing slash from $dir if found */
  43     if (substr($dir, -1) == '/') {
  44         $dir = substr($dir, 0, strlen($dir) - 1);
  45     }
  46
  47     /* Compute the hash for this user and extract the hash directories. */
  48     $hash_dirs = computeHashDirs($username);
  49
  50     /* First, get and make sure the full hash directory exists. */
  51     $real_hash_dir = getHashedDir($username, $dir, $hash_dirs);
  52
  53     /* Set the value of our real data file. */
  54     $result = "$real_hash_dir/$datafile";
  55
  56     /* Check for this file in the real hash directory. */
  57     if ($hash_search && !@file_exists($result)) {
  58         /* First check the base directory, the most common location. */
  59         if (@file_exists("$dir/$datafile")) {
  60             rename("$dir/$datafile", $result);
  61
  62         /* Then check the full range of possible hash directories. */
  63         } else {
  64             $check_hash_dir = $dir;
  65             for ($h = 0; $h < 4; ++$h) {
  66                 $check_hash_dir .= '/' . $hash_dirs[$h];
  67                 if (@is_readable("$check_hash_dir/$datafile")) {
  68                     rename("$check_hash_dir/$datafile", $result);
  69                     break;
  70                 }
  71             }
  72         }
  73     }
  74
  75     /* Return the full hashed datafile path. */
  76     return ($result);
  77 }
  78
  79 function getHashedDir($username, $dir, $hash_dirs = '') {
  80     global $dir_hash_level;
  81
  82     /* Remove trailing slash from $dir if found */
  83     if (substr($dir, -1) == '/') {
  84         $dir = substr($dir, 0, strlen($dir) - 1);
  85     }
  86
  87     /* If necessary, populate the hash dir variable. */
  88     if ($hash_dirs == '') {
  89         $hash_dirs = computeHashDirs($username);
  90     }
  91
  92     /* Make sure the full hash directory exists. */
  93     $real_hash_dir = $dir;
  94     for ($h = 0; $h < $dir_hash_level; ++$h) {
  95         $real_hash_dir .= '/' . $hash_dirs[$h];
  96         if (!@is_dir($real_hash_dir)) {
  97             if (!@mkdir($real_hash_dir, 0770)) {
  98                 echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>' .
  99                      _("Could not create hashed directory structure!") . "<br>\n" .
 100                      _("Please contact your system administrator and report this error.") . "<br>\n";
 101                 exit;
 102             }
 103         }
 104     }
 105
 106     /* And return that directory. */
 107     return ($real_hash_dir);
 108 }
 109
 110 function computeHashDirs($username) {
 111     /* Compute the hash for this user and extract the hash directories. */
 112     $hash = base_convert(crc32($username), 10, 16);
 113     $hash_dirs = array();
 114     for ($h = 0; $h < 4; ++ $h) {
 115         $hash_dirs[] = substr($hash, $h, 1);
 116     }
 117
 118     /* Return our array of hash directories. */
 119     return ($hash_dirs);
 120 }
 121
 122 ?>